ACF not visible in dedicated server

Have a linux box with gmod server. added ACF to addons on the server with folder structure as addons\ACF\lua so that should be correct. cloned https://github.com/nrlulz/ACF.git with git. ran server and didn’t see any errors and it did say adding ACF or such. did exactly the same on my client PC. but if I join the server, ACF is not working, just cannot see it under tools or any sign of it. However, if i create a single player game on that client PC then ACF shows up no problem? I notice that the Armoured Combat Framework branch I am using from here https://github.com/nrlulz/ACF does not have addon.txt - could this be the culprit? if that’s not the prime source for ACF then what is? the master old one here https://github.com/ACF-Gmod/ACF ?

I didn’t think ACF was linux compatible?

is it not? you can run dedicated server on linux so i would have thought addons work on whatever platform the game works…